The Key to the Lock — David Sloma

Dnierf Lem, a young bookstore clerk in the big city, stumbles into a mysterious scavenger hunt of sorts. But is it just someone rich playing an elaborate game, toying with him? It seems so, but he's not sure. Where the “game” will end Dnierf doesn't know. But he can't resist playing it, as the lure of money and adventure drives him forward, even after his life is put at risk. He'll find out there is much more to this than a game, if he can keep ahead of those trying to kill him!